قالب وردپرس درنا توس
Home / Science / Hubble discovers purple & # 39; jellyfish & # 39; star lighting in the abyss of outer space

Hubble discovers purple & # 39; jellyfish & # 39; star lighting in the abyss of outer space



In this new image from the Hubble Space Telescope it looks like a top view of a jellyfish in space. Space is actually the planetary nebula NGC 2022.

(Photo credit: ESA / Hubble & NASA, R. Wade) [1

9659004] This breathtaking new photo of the Hubble Space Telescope seems to capture a cosmos Jellyfish floating in space, but in reality this structure is not a living thing.

Instead, this object – known as NGC 2022 – shows what happens when an old star, which is similar in size to the Sun, grows old and sheds layers of gas. Astronomers refer to these objects as planetary nebulae because they looked a bit like planets in the first low-power telescopes of the 16th and 17th centuries. Today we know that the term " planetary nebula " is a misnomer – this nebula or gas cloud has nothing to do with planets.

NGC 2022 is rather a red giant star ]. This is the next evolutionary stage, after a Sun-like star (a star between three and eight solar masses) has converted hydrogen in its nucleus to helium by nuclear fusion. The two light atomic types combine or merge into a heavier atom.

Related: The best Hubble Space Telescope images ever!

At some point, stars of this type emit hydrogen in the nucleus. Gravity pushes the star and causes temperatures to rise during contraction. Once the temperature is high enough, helium can merge into carbon – and as a result, the star expands in a much larger radius than before. This newly extended star, called a red giant, then hurls its outer gas layers into space.

"More than half of the mass of such a star can be dropped in this way and forms a shell of surrounding gas," said a statement by Hubble . "At the same time, the core of the star is shrinking and warming, emitting ultraviolet light that makes the emitted gases glow."

Related: Distinguishing star types (infographic)

The core of the star is visible in the center of the picture and glows violently yellow-orange. Its radiation illuminates the surrounding gas clouds, which are presented in much cooler wavelengths of pink and purple.

The Sun is about 4.5 billion years old and is located approximately in the middle of its phase when hydrogen is burned to helium. When its red giant phase occurs, the sun is expected to devour much of the inner solar system – possibly the Earth as well. In both cases, life on our planet is unlikely to survive, but fortunately, this is only expected in another 4.5 billion years. This is a lot of time for people to understand interstellar travel and find a new place to live.

Follow Elizabeth Howell on Twitter @howellspace . Follow us on Twitter @SpaceTotcom and on Facebook .


Source link